package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.R;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.entity.dto.DishDto;
import com.itheima.reggie.mapper.DishMapper;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.stream.Collectors;

@Service
@Slf4j
public class DishServiceImpl extends ServiceImpl<DishMapper, Dish> implements DishService {
    @Autowired
    private DishFlavorService dishFlavorService;

    @Autowired
    private DishService dishService;

    //开启事务，保持事务的一致性
    @Transactional
    public void saveWithFlavor(DishDto dishDto) {
        //保存菜品的基本信息到菜品dish里
        this.save(dishDto);

        Long dishID = dishDto.getId();//菜品id

        //菜品口味
        List<DishFlavor> flavors = dishDto.getFlavors();
        flavors = flavors.stream().map((item) -> {
            item.setDishId(dishID);
            return item;
        }).collect(Collectors.toList());

        //保存菜品口味道数据到dish_flavor
        dishFlavorService.saveBatch(flavors);
    }
    //根据ID查询菜品和对应口味信息
    @Override
    //开启事务，保持事务的一致性
    @Transactional
    public DishDto getByIdWithFlavor(Long id) {
        //查询菜品基本信息，从dish表里查
        Dish dish = this.getById(id);

        //拷贝
        DishDto dishDto = new DishDto();
        BeanUtils.copyProperties(dish,dishDto);

        //查询当前菜品对应的口味信息，从dish_flavor表里查询
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId,dish.getId());
        List<DishFlavor> flavors = dishFlavorService.list(queryWrapper);

        dishDto.setFlavors(flavors);


        return dishDto;
    }
    //修改菜品和对应口味信息
    //开启事务，保持事务的一致性
    @Transactional
    @Override
    public void updateWithFlavor(DishDto dishDto) {

        //更新dish表的信息
        this.updateById(dishDto);

        //清理当前菜品对应的口味信息
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId,dishDto.getId());

        dishFlavorService.remove(queryWrapper);

        //添加提交过来的数据
        List<DishFlavor> flavors = dishDto.getFlavors();

        flavors = flavors.stream().map((item) -> {
            item.setDishId(dishDto.getId());
            return item;
        }).collect(Collectors.toList());

        dishFlavorService.saveBatch(flavors);
    }

    @Override
    public R<String> deleteMoreDish(String ids) {
        //sql
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        String[] arr =ids.split(",");
        queryWrapper.in(Dish::getId,arr);

        dishService.remove(queryWrapper);

        return R.success("删除菜品成功！");

    }
}
